blockActiveAirFlow
Active maximum and minimum setpoints for cooling only terminal unit
Information
This block outputs the active maximum and minimum airflow setpoint for cooling only terminal unit. The implementation is according to the Section 5.5.4 of ASHRAE Guideline 36, May 2020.
The setpoints shall vary depending on the mode of the zone group.
| Setpoint | Occupied | Cooldown | Setup | Warm-up | Setback | Unoccupied |
|---|---|---|---|---|---|---|
Cooling maximum (VActCooMax_flow) | VCooMax_flow |
VCooMax_flow | VCooMax_flow |
0 | 0 | 0 |
Minimum (VActMin_flow) | VOccMin_flow |
0 | 0 | 0 | 0 | 0 |
Heating maximum (VActHeaMax_flow) | VOccMin_flow |
0 | 0 | 0 | 0 | 0 |
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | VCooMax_flow | Design zone cooling maximum airflow rate |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.IntegerInput | uOpeMod | Zone operation mode | |
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | VOccMin_flow | Occupied minimum airflow setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | VActCooMax_flow | Active cooling maximum airflow setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | VActMin_flow | Active minimum airflow setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | VActHeaMax_flow | Active heating maximum airflow |
Revisions
-
August 1, 2020, by Jianjun Hu:
First implementation.